Its true that a spot being there for 4 years most likely is benign. However, some sores can be pre-cancerous. The pre-cancerous lesions may never turn into cancer or they could become cancerous after months, maybe even years. I would NOT trust an oral surgeons assistant in this.

As recommended previously, find a qualified ENT and get it biopsied. Only then will you know for certain what you are dealing with. I advise to not push this off. Oral cancer often shows no symptoms which leads to being discovered in the later stages making a successful treatment more difficult.

What state are you in and which walk are you planning on attending? Maybe I will see you there smile

Christine
SCC 6/15/07 L chk & by L molar both Stag I, age44
2x cispltn-35 IMRT end 9/27/07
-65 lbs in 2 mo, no caregvr
Clear PET 1/08
4/4/08 recur L chk Stag I
surg 4/16/08 clr marg
215 HBO dives
3/09 teeth out, trismus
7/2/09 recur, Stg IV
8/24/09 trach, ND, mandiblctmy
3wks medicly inducd coma
2 mo xtended hospital stay, ICU & burn unit
PICC line IV antibx 8 mo
10/4/10, 2/14/11 reconst surg
OC 3x in 3 years
very happy to be alive smile